Adjustable chair



2 N 0 H O N Y P E ADJUSTABLE CHAIR.

No. 484,571. Patented Oct. 18, 1892.

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(No Model.) 2 Sheets-Sheet 2.

E. PYNO'HON.

ADJUSTABLE OHAIR.

No. 484,?71. n Patented O0t.18,1892.

I UNITE STATES PATENT FFICE.

EDWIN 'PYNCHON, or CHICAGO, ILLINOIS, ASSIGNOR TO ALBERT HOEFFER, JOHN C. SKELTON, AND AARON P. GOULD, OF CANTON, OHIO.

ADJ-USTABLE CHAIR.

SPECIFICATION forming part of Letters Patent No. 484,571, dated October 18, 1892. Application filed February 24, 1888. Serial No. 265,203. (No model.)

To all whom it may concern.-

chair the weight thereof will hold the legs A Be it known that I, EDWIN PYNCHON, a citiin such turned-down position. gem of the United States, residing at Chicago, E is a double cross-bar on the chair-frame, 1n the county of Cook aud'State of Illinois, extended from the upper cross-bars A on have invented a new and useful'Adjustable which is pivoted the elbow-lever B, to one Chair,of which the following is aspecification. end of which is secured the rod B and to the My invention relates to adjustable chairs, other the spring-surrounded and laterally-acsuch as are used by surgeons and the like; tuated reciprocating rod B adapted to pass and its object is to provide an improved conthrough the apertures in the side bar of the IO struction of the same wherebyI secure supetilting frame, and thus lock the same in ponor advantages with respect to efficiency in sition. The rod B? is secured to the transoperation. verse bar B to the ends of which are fas- The invention consists in the novel contened the foot-piece Biwherebysaid bar may struction and combination of parts hereinafbe depressed to operate the lever B,and thus I 5 ter fully described and claimed. Withdraw the lock-bars and free the tilting In the accompanying drawings, Figure l is frame. The bar 13 passes at either end a perspective view of a chair constructed in through the vertical slot B in the projection accordance with my invention. Fig. 2 is a B which is securely fastened to the cross-bar side view of the same, the cushions being re- A. On one side of the chair there is at the :0 moved. Fig. 3 is a plan view partly broken lower end of the slot B a short horizontal away. Figs. 4 and 5 are detailed sectional slot B in which can be hooked the bar 13, views at line 10 w of Fig. 3, on an enlarged thereby causing the tilting frame to remain scale, showing the seat-elevating mechanism. unlocked, so that the chair can be swung or Figs. 6 and 7a1-e detail views of the knee-rest. rocked. The bar 13 is further provided at 25 In the said drawings the reference-lettersA either end with the pin B, which prevents A designate the side bars of the seat-frame, too great lateral motion of the bar through curved as shown, provided each with the crossthe slot B The laterally-reciprocatory lockbars A A and coupled together by the crossing-rod B travels in the bearings B B and rod A A. This frame rests upon the priafter passing through apertures in side bar 30 mary legs or rollers A A". To secure a E of the tilting frame is received in hole B proper position for frame cross-rod A so that in the projection 13, thereby giving rigid supit will not be engaged by the bottom of the port to the tilting frame. limb-support when the tilting frame is being 0 is a bar having the pivot-pieces O, the operated, it is attached on either side to the lower of which is the longer, by which it is 3 5 short bar A Adjacent to each of the rollers pivoted upon any convenient portion of the on one side of the chair are the short secondchair-as, for instance, upon the limb-supary legs A A the same being a little shorter portand projecting from it and pivoted to than such roller and its support on the outit are the two bars 0 C joined bythe pivoted side thereof. Adjacent to and inside of the ratchet-bar (1 which is adapted to engage 4o rollers on t-heopposite side of the chair are the pivoted diagonally-hanging hook 0 go 'the secondary hinged legs A A". These lat- Upon C is pivoted the foot-rest O9, and also ter legs are secured on rod A pivoted to the the leg-supporting bars 0 G which are concross-bar A at the points A A On this rod nected at their upper ends by the link-rods is the foot-piece A and the coiled spring A, C C and which carry, respectively, the piv- 45 the two being opposed, so that the spring otally-supported leg-rests 0 C. 5 tends to hold the legs A folded up, while by Pivoted to the front of the tilting frame is pressing upon the foot-piece when that side the limb-support consisting of the side bars of the chair is raised they may be turned D D, to the lower end of which is pivoted down until the projectionA engages the botthe foot-piece D. The bars D D are con- 50 tom of the cross-bar A, when by lowering the nected by suitable framework and the foot- [00 piece is made up as desired. The outer edge the link-bars D D D. Upon the forward end of each side bar of the tilting frame is pivoted on the cross-rod D the bar D to the lower end of which is pivoted the bar D and this bar in turn is pivoted to the sidebars D. The limb-support is held at any convenient angle by means of the ratchet-bar B adapted to engage the cross-rod D of the tilting frame.

E is the side bar of the tilting frame, having an upper portion E. The two sides are connected by the cross-rods D D and by the cross-bars E and E These bars E and E are connected by irregularly-shaped bars E E, which give support to the elevating mechanism and which inturn are connected by the cross-bar E", which serves additionally as a stop to the rotation of the sector-plate G when the seat-frame F is fully elevated. Along the lower portion of E are the perforations E arranged in a right line. The support E is suspended by links E E E from the cross-bar at the top of the chair-frame, the link E being pivoted to a short hanging piece E on said cross-bar. To the forward end of the tilting-frame bars E are pivoted the seat'frame bars F, which, with suitable cross-bars, form the seat-frame.

F are short rigid bars in the seat-frame, to which the elevating mechanism is attached.

F F are handles secured, respectively, to the front and rear of the seat-frame.

The seat-frame is adjustabl y secured in the rear by the following means:

G G are curved bars pivoted by screws at G to the end of the seat-frame bars F and at G2 to the ratchet-sector G which is pivoted at the point G to the bar E of the tilting frame.

G is a rock-shaft journaled in the side bars E E and having a handle G at either side. It also has the projection G", to which the link G8 is attached, such link being in turn connected to a downward project-ion G on the cross-bar G which is also pivoted in the bar E at the point G by means of the short arms G11 and is adapted to engage the notches on the ratchet-sector G The short arms G are constantly drawn forward by the action of the spiral springs (l G which hook about an extension of the bar G Each of the ratchets on the sector-plate is provided with a square lip G to prevent the cross-bar G escaping therefrom until the sector has been slightly turned by elevating the seat-frame. In addition to the ratchets shown in the ratchet-sector is the square notch G, which when the seat-frame is lowered engages the crossbar G and locks the seat-frame down. To release it requires that pressure he made upon the handle G 7 (l G are cross-bars which join together the bars G G, making thereby a rigid supporting-frame.

The corner of the ratchet-sector G engages the cross-bar E when the seat is fully elevated, as shown in Fig. 4.

J is the back of the chair, composed of suitable framework, cross-bars, &c., and pivoted at the points J to the lugs F which are secured to the rear of the seat-frame.

K, K, and L are respectively the leg-rest, seat, and back-cushions; N,a pillow, and M a pil1ow-case.

The letter O designates a folding knee rest or support, which is attached to the side of the chair which is lowest when tilted for the Sims position,as shown in Fig.1. This kneerest forms a sort of side. extension to the chair-seat, as shown, and prevents the occupant slipping ofi when the chair is tilted in.

the Sims position. It is composed of a vertical and a horizontal section, which are hinged together at point 0. When opened, the projection O engages the cross-rod 0 The horizontal section is pivotally hinged at O to the pieces 0 and when opened to a position at right angles thereto engages the cross-bar 0 which joins the pieces 0 0 which pieces are further provided with slots 0 0", so that they can be set upon the side bars F of the seat-frame. This knee-support when fullyopened assumes the position shown in Fig. 1, and when not in use can be folded in a small compass, as shown in Fig. 7.

In use the chair-frame rests upon the primary legs or rollers A A. The short secondarylegsMA are adapted to engage the ground or floor, and thus relieve the rollers A 1} when the opposite side of the chair is slightly tilted, and the chair is then supported in a tilted position by means of the secondary hinged legs A A, which are brought into position by pressure of the foot upon the footpiece A thus rotating the rod A against the action of the spring A and turning the legs A A down into position. The chair must be sufficiently tilted before this can be done, and it is then allowed to rest upon the secondary legs in a tilted position. It will be observed that the employment of the secondary legs A A in addition to freeing the rollers A A adjacent thereto, also has the efifect of changing the normal center of gravity of the chair and removes the possibility of the tipping over of the chair when tilted. Without their employment in a chair mounted on rollers the same would be when tilted very insecure.

By simply raising the elevated side of the chair very slightly the secondary hinged legs will be released and caused to fold up under the chair by the action of the spring A, when the chair may be lowered to rest in its normal position on. the rollers A A. The secondary position.

secondary hinged legs can be used together, if desired, which will result in the entire chair being vertically and bodily elevated.

To raise the seat-frame, its rear end is elevated by the handle F which operation through the medium of the bar G rotates the sector, and the latter is then looked in position by the transverse bar, which engages its notches, said bar being held or drawn into such notches by due action of the spiral springs G It will be seen that by lessening the tilt and employing any of the intermediate notches in the sector-plate different degrees of elevation or tilt of the seat-frame can be obtained at will.

To lower the seat-frame, it is first slightly elevated, so that the cross-bar G may clear the points or square ends of the notches, and by operating the handle G6 the rod G is rocked or rotated slightly in its bearings, pressure applied to the link G and the cross-bar G thrown backward against the action of the spiral springs G and out of the notches in the ratchet-sector. The seat is then lowered to the position desired and the handle re leased, whereupon the spiral springs will cause the cross-bar G to engage the proper ratchetnotch.

It will beobserved that in several instances I have described but one device when there are duplicates-that is, I have described in the singular a device which may be found on both sides of the chair-and it will be understood that the description will thus apply to either side or both sides or to both of the duplicated forms.

Having thus described my invention, what I claim is 1. In an adjustable chair, the combination of the chair-frame, with primary legs on which it normally rests, fixed secondary legs on one side of the chair slightly shorter than the primary legs, and hinged secondary legs on the other side of the chair longer than the primary legs, adapted to be turned downward to support the chair or adapted to be folded upward out of the way, so that the chair may rest upon its primary legs, or when the hinged secondary legs are turned down the chair can rest upon all its secondary legs and be supported at an angle.

2. In an adjustable chair, the combination, with the chair-frame, of primary legs, fixed secondary legs at one side of the chair, slightly shorter than the primary legs, hinged secondary legs at the other side of the chair longer than the primary legs, springs to normally fold the hinged secondary legs up under the chair-frame, and a foot-lever by the operation of which such secondary legs may be thrown down into position of use.

3. In an adjustable chair, the combination of primary legs with casters on which the chair moves, secondary legs on one side slightly shorter and upwardly extending and external to the primary legs, and folding secondary legs on one side slightly longer than the primary legs.

4:- In an adjustable chair, the combination of a seat-frame with a supporting-frame, said seat-frame pivoted at one end to said supporting-frame, bars pivoted to the other end of said seat-frame, pivoted ratcheted sectors on the supporting-frame, said bars being eccentrically pivoted thereto, and locking devices to secure the sectors in any position, so that the free end of the seat-frame may be adj ustably supported.

5. In an adjustable chair, the combination of a chair-frame provided with primary legs and with secondary legs slightly shorter than the primary legs adjacent thereto and extending outwardly, so that by raising the opposite side of the chair the tilt will cause the secondary legs to engage the floor and leave the primary legs free, and means for holding said chair in tilted position.

6. In an adjustable chair, the combination of a chair-frame provided with primary legs and on one side with short secondary legs slightly shorter than the primary legs, while the opposite side of the chair is provided with hinged secondary legs longer than the primary legs, which when lowered elevate their side of the chair and cause the secondary legs on the opposite side to engage the floor, so that the primary legs are left free.

7. In an adjustable chair, a knee-rest consisting of a horizontal portion secured at the side of the chair and a vertical portion hinged to the extremity thereof.

EDWIN PYNOHON.

. Witnesses:

CORA L. GADWALLADER, JOHN R. NErrENsrRoM. 

